Problems with pixel perfect layout were what made me give SwiftUI a 12 month “wait for maturity” last year. I hope this and the new SwiftUI custom layout capabilities signal an interest in this at Apple.

I was making strip charts of data at fairly high density and wanted my minor grid lines to be one pixel wide. You must make them line up with a physical screen pixel or they turn into a blurry anti aliased mess. As of last year I never found a good way to connect a SwiftUI view to its physical screen pixel positions. I’ve done this for many years in UIKit, and while extra effort, it is at least possible.

I think this problem is partially why people used “magic marker” aesthetic on their digital charts rather than “engineering pad”. I guess it’s time for another crack at it.